Sahih Bukhari Volume 1, Book 8, Hadith 516

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، قَالَ أَخْبَرَنَا مَالِكٌ، عَنْ عَامِرِ بْنِ عَبْدِ اللَّهِ بْنِ الزُّبَيْرِ، عَنْ عَمْرِو بْنِ سُلَيْمٍ الزُّرَقِيِّ، عَنْ أَبِي قَتَادَةَ الأَنْصَارِيِّ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُصَلِّي وَهْوَ حَامِلٌ أُمَامَةَ بِنْتَ زَيْنَبَ بِنْتِ رَسُولِ اللَّهِ صلى الله عليه وسلم وَلأَبِي الْعَاصِ بْنِ رَبِيعَةَ بْنِ عَبْدِ شَمْسٍ، فَإِذَا سَجَدَ وَضَعَهَا، وَإِذَا قَامَ حَمَلَهَا

Narrated By Abu Qatada Al-Ansari : Allah's Apostle was praying and he was carrying Umama the daughters of Zainab, the daughter of Allah's Apostle and she was the daughter of 'As bin Rabi'a bin 'AbduShams. When he prostrated, he put her down and when he stood, he carried her (on his neck).